ibygrk use doc/fonts, tex/generic, and ibycus4.map is both tex&mf source (rk 2 Feb 2008 21:17:59 et al.)

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+[This is ./doc/fonts/ibycus3/tex/README
+ May 1992, revised Apr. 1994, revised for LaTeX2e Sep-Oct. 1995
+ Final notes on Ibycus 3, May 30, 1966 ]
+	
+		( THIS IS A TDS-CONFORMANT PACKAGE )
+
+BE SURE THAT ibycus3.map HAS BEEN COPIED AS DESCRIBED BELOW
+
+A sample input file is provided in iby3text.tex or ibycus3.ltx
+
+PLAIN TeX USAGE:   \input iby3text
+
+	then: \setgreek10/12 (or other reasonable combination 
+				of pointsize and leading)
+
+	then: Latin text \GK{}a)rxai=a gra'mmata\RM{} Latin again.
+
+		NOTE that the ) is a smooth breathing, not a parenthesis.
+
+LaTeX2e USAGE:  \usepackage{ibycus3}
+
+	then: Latin text {\greek{a)rxai=a gra'mmata}} Latin again.
+		(Note the double braces, there is a font change here.)
+
+	change font size with the \fontsize macro, thus:
+ 		
+		\fontsize{14}{17pt}\selectfont
+        
+
+The TeX files in $TEXMF/tex/generic/ibycus3 together with the 
+METAFONT files in $TEXMF/fonts/source/public/ibycus3
+{\em especially ibycus3.map} are intended to provide a
+reasonable degree of compatibility between David Packard Jr.'s
+Ibycus/TLG system, and the TeX and METAFONT environment.  These TeX
+files may have to be moved to an appropriate branch directory of
+$TEXMF/tex/ if you are not using Karl Berry's path-searching
+or its equivalent.
+
+The package consists of a set of METAFONT files which use the original
+characters of Silvio Levy's greek fonts (these can be got from
+one of the CTAN archives and placed in $TEXMF/fonts/source/public/levy
+if you are using a TeX Directory Structure [TDS] layout of files)
+and combine them in ways which reflect the increased capabilities of TeX
+and METAFONT developed since Levy did the original greek for TeX.
+If you are not using a file searching system like Karl Berry's
+"kpathsea", see $TEXMF/fonts/source/public/ibycus3/ibycus3.mf for
+hints on making the levy source available
+
+Ibycus3 METAFONT files are in $TEXMF/fonts/source/public/ibycus3
+
+The most significant changes are:
+
+	1.  The large repertory of initial/medial sigma + letter pairs
+	is suppressed from the new fonts, and the new enhanced TFM
+	ligature scheme is used instead to provide for the automatic
+	differentiation between medial and final sigma.
+
+	2.  The cells thus opened up in the font mapping are used for
+	a variety of additional characters:
+
+		a.  A full repertory of vowels with breathings and
+		barytone accents (absent from the original).
+
+		b.  Digamma, koppa and sampi (the last in lowercase
+		late form only, since earlier forms are rather
+		problematic and are virtually unused even in
+ 		epigraphical texts).  
+		NOTE: there is still room for things like acrophonic
+		numerals, and perhaps the two markers used to
+		distinguish numeric from alphabetic use of the letters
+		ought to be provided.   Another possibility is
+		special symbols for text-edition, such as double
+		brackets.  (Editor supplements can be done
+		using the characters defined in iby3extr.tex).
+	
+		Iota subscript retains its simple form in 300dpi
+		renditions, and in any bitmap which drops below
+		500dpi, but it thins out and develops a slight
+		rightward hook at 600dpi and above.
+
+	3.  All characters have been named.  The constructs
+	ASCII"A" and oct"000" appear only at lower levels 
+	of programming.
+
+	4.  Character spacing has been adjusted through kerning tables,
+	particularly around lowercase iota (file ibylig.mf).
+	There is more that could and should be done.  
+        Maybe it will yet happen.
+
+	5.  Font mapping is specified independently of other
+ 	parameters, in a distinct and separate file (file ibycus3.map).
+	In some cases it may be more effective to remap the font
+	than to struggle with TeX remapping.  
+
+	6.  Accents have been redesigned in several cases, usually
+	in an attempt to reduce crowding among the elements of
+        accent clusters.  The accents with diaeresis have been shifted
+        to clear the dot they lean toward.  A programming error which
+        produced the wrong displacement value with free-standing accents
+        has been corrected. Accents before uppercase vowels are
+        pair-kerned with the vowels.  Angle brackets, half brackets,
+        double quotes, braces and a dagger are now provided (see 
+        ibyextra.tex).
+
+The associated TeX files are:
+
+	1.  $TEXMF/tex/generic/ibycus3/ibycus3.tex 
+	
+	The driver file for this package (in plain tex).
+
+        1a. $TEXMF/tex/generic/ibycus3/ibycus3.sty
+
+	The driver file for this package (in LaTeX2e).
+
+	2.  $TEXMF/tex/generic/ibycus3/set3grk.tex 
+
+	Included by ibygrk.tex unless newnep format is running
+
+	3.  $TEXMF/tex/generic/ibycus3/tlgsqq.tex
+
+	The name suggests the association with coding of the 
+	Thesaurus Linguae Graecae.
+
+	This file provides uniquely named macros for all combinations
+	of letter and accent, so that any invocation of the macro will
+	produce a sequence of characters corresponding with the
+	entries put into the TFM ligature table.  These sequences may
+	always be used to generate accented characters.  They are
+	based, with some slight modifications where David Packard's Ibycus
+	input coding seems too misleading, on the Ibycus adaptation of
+	TLG beta-code.  ) and ( are used for breathings, ' and ` are
+	used for oxytone and barytone (to avoid preemption of the
+	usual TeX excape character) and = is used for perispomenon
+	to avoid preemption of the active tie character in plain.tex.
+	| is used for iota subscript.  Order is significant.
+	Breathings or diereses come first, after the affected letter, then 
+	accents, then iota subscript.  + is dieresis, which should
+	only appear after u or i.  '' is the mark of elision
+	Single quotes may be provided by `` and '', but isolate them 
+        in braces whereever the first of either pair risks being
+	interpreted as an accent.
+
+	The digraphs, trigraphs etc can be read from tlgsqq.tex
+
+	Additional digraphs are K+ Koppa, k+ koppa, C+ lunate Cigma,
+	c+ lunate cigma, s+ sampi (lowercase late form only) and s| which
+	forces a medial sigma at word end.
+	<< and >> give guillemets (not guillemots as Adobe
+	ornithologically supposes) and (( )) give single parentheses
+	though care must be taken that the first ( or ) is not
+	interpreted as a breathing.  {((} and {))} are safe.
+	
+	4. ibycus3.map  
+
+	This is {\em exactly} the same file as is used by METAFONT.
+	Copy $TEXMF/fonts/source/public/ibycus3/ibycus3.map 
+	to the same directory as ibycus3.tex
+	or, even better, link it with a symbolic link.
+	It is so structured that it can be read by either
+	TeX or Metafont.  The mapping is very close to that of GreekKeys,
+	which is distributed for the Macintosh by the American
+	Philological Association. Other mappings can be created
+	in the same manner.
+
+        5. $TEXMF/tex/generic/ibycus3/Uibycus3.fd
+
+	Supporting fd file for LaTeX2e.
+
+	6. $TEXMF/tex/generic/ibycus3/iby3extr.tex
+
+	Some editorial symbols for classical editions.
+
+	7. $TEXMF/tex/generic/ibygrk/ibycus3.ltx
+	   $TEXMF/tex/generic/ibygrk/iby3text.tex
+	The exquisite little poem by Ibycus of Rhegium, until recently
+	almost the only thing known by him.  (The Ibycus system
+	developed by David Packard is only indirectly named after
+	the poet.  The direct inspiration was Packard's cat.)
+
+NOTE: Earlier users of this package may be dismayed by the new naming
+system for the fonts, but it seems the only way to provide for
+desirable results.  It is necessary to keep this Ibycus package
+clearly distinct from the new package announced below.  Symbolic
+links are provided to ease the transition.  Ibycus4 (see below) will
+be as close as possible to Ibycus3 in all external respects, but
+there are some improved set widths which might clobber old carefully
+adjusted text spacings.  
+
+The new naming convention uses "ibycus3" wherever possible, and
+the shorter string "iby3" where that would lead to ambiguity.
+some of the individual METAFONT character files are simply
+taged with the number 3.  8+3 filename compatibility is preserved.
+(with difficulty).   
+
+The names of PK and TFM files follow Karl Berry's font name convention
+( 84 is the encoding for Ibycus 4, for which see below).
+
+Foundry   Facename    Weights   Variants    Encoding_Variants  DesignSize
+ 
+f            ib      [r], b      r, o         83, 84            [10], 9, 8
+ 
+fibr83 fibo83 fibb83 
+ 
+   with METAFONT design-size additions
+fibr838 fibo838 fibb838 
+fibr839 fibo839 fibb839 
+ 
+
+
+Still in the future.
+
+	Ibycus4 will have the major epigraphical characters and conventions,
+        dotted letters, epsilon and omicron with perispomene accent
+        for pre-403 Attic orthography, uprighted italic h for aspirate and
+	a special set of TFM files for "stoichedon" inscriptions.
+	Maybe even a prime that really works for numbers.  
+	The input coding for Ibycus4 is hardly changed at all from
+	Ibycus3 coding: The apostrophe and single quotes can be
+	given as ` {`} and ' {'} instead of having to be doubled
+	and <> give conjectural emendation angle brackets without
+	requiring an excursion into math mode.  ! {\bang} gives
+	a dotted letter for all except iota-subscripted vowels.
+	Slight improvements in set widths, which is the chief reason
+	for keeping Ibycus3 and Ibycus4 clearly separate.
+
+	Also in the works, a type1 version.
+
+Pierre A. MacKay
+Department of Classics
+University of Washington
+mackay@cs.washington.edu